Tsarin ruwan tabarau na ci gaba na OptoTech SD yana bazuwar astigmatism da ba'a so a cikin manyan wuraren ruwan ruwan tabarau, ta haka yana rage girman girman blur gabaɗaya a cikin kuɗaɗen yanki na hangen nesa cikakke.Kuskuren astigmatic na iya ma shafar yankin nesa.Sakamakon haka, ruwan tabarau masu taushin ci gaba gabaɗaya suna nuna halaye masu zuwa: Yankunan nisa kunkuntar, mafi faɗi kusa da shiyyoyi, da ƙasa, mafi ƙaranci matakan astigmatism (filayen sararin samaniya).Max.An rage adadin astigmatism maras so zuwa matakin ban mamaki na kusan.75% na ƙarfin ƙarawa. Wannan bambance-bambancen ƙira ya shafi wani ɓangare na wuraren aiki na zamani.